AutoCompleteBox and Enter key

I want to accomplish that AutoCompleteBox accepts enter key, so that user can type new line in the AutoCompleteBox.
Is it possible, or applicable?

According to documentation (MSDN) I have created TextBox style
<Style x:Key="myTBStyle" TargetType="TextBox">
<Setter Property="TextWrapping" Value="Wrap"></Setter><Setter Property="VerticalScrollBarVisibility" Value="Visible"></Setter><Setter Property="AcceptsReturn" Value="True"></Setter>
</Style>
, that is applied to the AutoCompleteBox

<input:AutoCompleteBox TextBoxStyle="{StaticResource myTBStyle}"

But when user pres the enter key AutoCompleteBox.OnKeyDown event handler is called (AutoCompleteBox.cs, line 2652) and where the Key.Enter is handled in the standard way, like commit event.